ADN2841ACPZ-32 Analog Devices Inc, ADN2841ACPZ-32 Datasheet

IC,Laser Diode/LED Driver,LLCC,32PIN,CERAMIC

ADN2841ACPZ-32

Manufacturer Part Number
ADN2841ACPZ-32
Description
IC,Laser Diode/LED Driver,LLCC,32PIN,CERAMIC
Manufacturer
Analog Devices Inc
Type
Laser Diode Driver (Fiber Optic)r
Datasheet

Specifications of ADN2841ACPZ-32

Data Rate
2.7Gbps
Number Of Channels
1
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
50mA
Current - Modulation
80mA
Current - Bias
100mA
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VFQFN, CSP Exposed Pad
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADN2841ACPZ-32
Manufacturer:
Analog Devices Inc
Quantity:
135
Part Number:
ADN2841ACPZ-32
Manufacturer:
AD
Quantity:
87
a
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
REV. A
FEATURES
50 Mbps to 2.7 Gbps Operation
Typical Rise/Fall Time 80 ps
Bias Current Range 2 to 100 mA
Modulation Current Range 5 to 80 mA
Monitor Photodiode Current 50 A to 1200 A
Closed-Loop Control of Power and Extinction Ratio
Laser Fail and Laser Degrade Alarms
Automatic Laser Shutdown, ALS
Dual MPD Functionality for DWDM
Optional Clocked Data
Full Current Parameter Monitoring
5 V Operation
48-Lead LFCSP Package
32-Lead LFCSP Package (Reduced Functionality)
APPLICATIONS
DWDM Dual MPD Wavelength Fixing
SONET OC-1/3/12/48
SDH STM-1/4/16
Fibre Channel
Gigabit Ethernet
MPD
GND
GND
GND
ERSET
IMPD2
PSET
V
IMPD
CC
GND
ERCAP
FUNCTIONAL BLOCK DIAGRAM
GND
CONTROL
PAVCAP
I
I
MOD
BIAS
IDTONE
GENERAL DESCRIPTION
The ADN2841 uses a unique control algorithm to control both
the average power and extinction ratio of the laser diode (LD)
after initial factory setup. External component count and PCB area
are low, since both power and extinction ratio control are fully
integrated. Programmable alarms are provided for laser fail (end
of life) and laser degrade (impending fail).
The ADN2841 has circuitry for a second monitor photodiode,
which enables DWDM wavelength control.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel:
Fax: 781/326-8703
V
CC
781/329-4700
IMODN
Dual-Loop 50 Mbps–2.7 Gbps
ADN2841
LBWSET
IMODP
IBIAS
ASET
GND
Laser Diode Driver
DATAP
DATAN
CLKP
CLKN
LD
V
CC
© Analog Devices, Inc., 2002
ADN2841
www.analog.com

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ADN2841ACPZ-32 Summary of contents

Page 1

FEATURES 50 Mbps to 2.7 Gbps Operation Typical Rise/Fall Time 80 ps Bias Current Range 2 to 100 mA Modulation Current Range Monitor Photodiode Current 1200 A Closed-Loop Control of Power and ...

Page 2

ADN2841–SPECIFICATIONS Parameter LASER BIAS (BIAS) Output Current I BIAS Compliance Voltage I during ALS BIAS ALS Response Time CCBIAS Compliance Voltage MODULATION CURRENT (IMODP, IMODN) Output Current I MOD Compliance Voltage I during ALS MOD Rise Time Fall Time Jitter ...

Page 3

Parameter IBMON, IMMON, IMPDMON, IMPDMON2 IBMON, IMMON Division Ratio IMPDMON, IMPDMON2 IMPDMON to IMPDMON2 Matching Compliance Voltage SUPPLY NOTES 1 Temperature range: –40°C to +85°C. 2 When the voltage on DATAP is greater than ...

Page 4

ADN2841 48-Lead LFCSP GND2 37 VCC2 38 IMODN 39 IMODN 40 GND2 41 ADN2841 IMODP 42 TOP VIEW IMODP 43 (Not to Scale) GND2 44 GND2 45 IBIAS 46 IBIAS 47 CCBIAS 48 PIN 1 INDICATOR Pin No. 48-Lead 32-Lead ...

Page 5

Pin No. 48-Lead 32-Lead Mnemonic 37 GND2 38 25 VCC2 39 26 IMODN 40 IMODN 41 27 GND2 42 28 IMODP 43 IMODP 44 29 GND2 45 30 GND2 46 31 IBIAS 47 IBIAS 48 32 CCBIAS REV. A PIN ...

Page 6

ADN2841 GENERAL Laser diodes have current-in to light-out transfer functions as shown in Figure 2. Two key characteristics of this transfer function are the threshold current and the slope in the linear region beyond TH the threshold current, ...

Page 7

REF CLOCK 20MHz– 180MHz CLKIN 1.25mA–20mA I OUT AD9850/AD9851 DDS I OUT R SET 50 37.5 A–600 A CONTROLLER The second photodiode current is mirrored to IMPDMON2 for wavelength control purposes and is summed internally for the power control loop. ...

Page 8

ADN2841 ALARM INTERFACES A 30 kΩ internal pull-up resistor is employed to pull the digital high value of the alarm outputs However, the ADN2841 CC has a feature that allows the user to externally wire resistors in ...

Page 9

SHOULD HAVE BYPASS CAPACITORS AS CLOSE AS POSSIBLE TO THE CC ACTUAL SUPPLY PINS ON THE ADN2841 AND THE LASER DIODE USED. Figure 7. Anyrate Test Circuit, Capacitively Coupled, Data ...

Page 10

ADN2841 MODULATOR GND LBWSET ASET V ERSET CC PSET GND IMPD IMPDMON IMPDMON2 IMPD2 GND4 VCC4 12 Figure 9. Unfiltered 2.5 Gbps Optical Eye. Average Power = –3 dBm, Extinction Ratio = 9.5 ...

Page 11

PIN 1 INDICATOR 1.00 12 MAX 0.90 0.80 0.25 REF SEATING PLANE PIN 1 INDICATOR 12 MAX 1.00 0.90 0.80 SEATING PLANE REV. A OUTLINE DIMENSIONS 48-Lead Frame Chip Scale Package [LFCSP] (CP-48) Dimensions shown in millimeters 7.00 BSC SQ ...

Page 12

Revision History Location 8/02—Data Sheet changed from REV REV. A. Figure 8 replaced . . . . . . . . . . . . . . . . . . . . . . . . . ...

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